================ @@ -340,6 +340,50 @@ cplusplus C++ Checkers. +.. _cplusplus-ArrayDelete: + +cplusplus.ArrayDelete (C++) +""""""""""""""""""""""""""" +Reports destructions of arrays of polymorphic objects that are destructed as +their base class. If the dynamic type of the array's object is different from +its static type, calling `delete[]` is undefined. + +This checker corresponds to the CERT rule `EXP51-CPP: Do not delete an array through a pointer of the incorrect type <https://wiki.sei.cmu.edu/confluence/display/cplusplus/EXP51-CPP.+Do+not+delete+an+array+through+a+pointer+of+the+incorrect+type>`_. + +.. code-block:: cpp + + class Base { + public: + virtual ~Base() {} + }; + class Derived : public Base {}; + + Base *create() { + Base *x = new Derived[10]; // note: Casting from 'Derived' to 'Base' here + return x; + } + + void foo() { + Base *x = create(); + delete[] x; // warn: Deleting an array of 'Derived' objects as their base class 'Base' is undefined + } + +**Limitations** ---------------- whisperity wrote:
(Shouldn't this be a sub-heading?) https://github.com/llvm/llvm-project/pull/83985 _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
